BackendRule.java

/*
 * Copyright 2026 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: google/api/backend.proto

// Protobuf Java Version: 3.25.8
package com.google.api;

/**
 *
 *
 * <pre>
 * A backend rule provides configuration for an individual API element.
 * </pre>
 *
 * Protobuf type {@code google.api.BackendRule}
 */
public final class BackendRule extends com.google.protobuf.GeneratedMessageV3
    implements
    // @@protoc_insertion_point(message_implements:google.api.BackendRule)
    BackendRuleOrBuilder {
  private static final long serialVersionUID = 0L;

  // Use BackendRule.newBuilder() to construct.
  private BackendRule(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
    super(builder);
  }

  private BackendRule() {
    selector_ = "";
    address_ = "";
    pathTranslation_ = 0;
    protocol_ = "";
  }

  @java.lang.Override
  @SuppressWarnings({"unused"})
  protected java.lang.Object newInstance(UnusedPrivateParameter unused) {
    return new BackendRule();
  }

  public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    return com.google.api.BackendProto.internal_static_google_api_BackendRule_descriptor;
  }

  @SuppressWarnings({"rawtypes"})
  @java.lang.Override
  protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
      int number) {
    switch (number) {
      case 10:
        return internalGetOverridesByRequestProtocol();
      default:
        throw new RuntimeException("Invalid map field number: " + number);
    }
  }

  @java.lang.Override
  protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
      internalGetFieldAccessorTable() {
    return com.google.api.BackendProto.internal_static_google_api_BackendRule_fieldAccessorTable
        .ensureFieldAccessorsInitialized(
            com.google.api.BackendRule.class, com.google.api.BackendRule.Builder.class);
  }

  /**
   *
   *
   * <pre>
   * Path Translation specifies how to combine the backend address with the
   * request path in order to produce the appropriate forwarding URL for the
   * request.
   *
   * Path Translation is applicable only to HTTP-based backends. Backends which
   * do not accept requests over HTTP/HTTPS should leave `path_translation`
   * unspecified.
   * </pre>
   *
   * Protobuf enum {@code google.api.BackendRule.PathTranslation}
   */
  public enum PathTranslation implements com.google.protobuf.ProtocolMessageEnum {
    /** <code>PATH_TRANSLATION_UNSPECIFIED = 0;</code> */
    PATH_TRANSLATION_UNSPECIFIED(0),
    /**
     *
     *
     * <pre>
     * Use the backend address as-is, with no modification to the path. If the
     * URL pattern contains variables, the variable names and values will be
     * appended to the query string. If a query string parameter and a URL
     * pattern variable have the same name, this may result in duplicate keys in
     * the query string.
     *
     * # Examples
     *
     * Given the following operation config:
     *
     *     Method path:        /api/company/{cid}/user/{uid}
     *     Backend address:    https://example.cloudfunctions.net/getUser
     *
     * Requests to the following request paths will call the backend at the
     * translated path:
     *
     *     Request path: /api/company/widgetworks/user/johndoe
     *     Translated:
     *     https://example.cloudfunctions.net/getUser?cid=widgetworks&amp;uid=johndoe
     *
     *     Request path: /api/company/widgetworks/user/johndoe?timezone=EST
     *     Translated:
     *     https://example.cloudfunctions.net/getUser?timezone=EST&amp;cid=widgetworks&amp;uid=johndoe
     * </pre>
     *
     * <code>CONSTANT_ADDRESS = 1;</code>
     */
    CONSTANT_ADDRESS(1),
    /**
     *
     *
     * <pre>
     * The request path will be appended to the backend address.
     *
     * # Examples
     *
     * Given the following operation config:
     *
     *     Method path:        /api/company/{cid}/user/{uid}
     *     Backend address:    https://example.appspot.com
     *
     * Requests to the following request paths will call the backend at the
     * translated path:
     *
     *     Request path: /api/company/widgetworks/user/johndoe
     *     Translated:
     *     https://example.appspot.com/api/company/widgetworks/user/johndoe
     *
     *     Request path: /api/company/widgetworks/user/johndoe?timezone=EST
     *     Translated:
     *     https://example.appspot.com/api/company/widgetworks/user/johndoe?timezone=EST
     * </pre>
     *
     * <code>APPEND_PATH_TO_ADDRESS = 2;</code>
     */
    APPEND_PATH_TO_ADDRESS(2),
    UNRECOGNIZED(-1),
    ;

    /** <code>PATH_TRANSLATION_UNSPECIFIED = 0;</code> */
    public static final int PATH_TRANSLATION_UNSPECIFIED_VALUE = 0;

    /**
     *
     *
     * <pre>
     * Use the backend address as-is, with no modification to the path. If the
     * URL pattern contains variables, the variable names and values will be
     * appended to the query string. If a query string parameter and a URL
     * pattern variable have the same name, this may result in duplicate keys in
     * the query string.
     *
     * # Examples
     *
     * Given the following operation config:
     *
     *     Method path:        /api/company/{cid}/user/{uid}
     *     Backend address:    https://example.cloudfunctions.net/getUser
     *
     * Requests to the following request paths will call the backend at the
     * translated path:
     *
     *     Request path: /api/company/widgetworks/user/johndoe
     *     Translated:
     *     https://example.cloudfunctions.net/getUser?cid=widgetworks&amp;uid=johndoe
     *
     *     Request path: /api/company/widgetworks/user/johndoe?timezone=EST
     *     Translated:
     *     https://example.cloudfunctions.net/getUser?timezone=EST&amp;cid=widgetworks&amp;uid=johndoe
     * </pre>
     *
     * <code>CONSTANT_ADDRESS = 1;</code>
     */
    public static final int CONSTANT_ADDRESS_VALUE = 1;

    /**
     *
     *
     * <pre>
     * The request path will be appended to the backend address.
     *
     * # Examples
     *
     * Given the following operation config:
     *
     *     Method path:        /api/company/{cid}/user/{uid}
     *     Backend address:    https://example.appspot.com
     *
     * Requests to the following request paths will call the backend at the
     * translated path:
     *
     *     Request path: /api/company/widgetworks/user/johndoe
     *     Translated:
     *     https://example.appspot.com/api/company/widgetworks/user/johndoe
     *
     *     Request path: /api/company/widgetworks/user/johndoe?timezone=EST
     *     Translated:
     *     https://example.appspot.com/api/company/widgetworks/user/johndoe?timezone=EST
     * </pre>
     *
     * <code>APPEND_PATH_TO_ADDRESS = 2;</code>
     */
    public static final int APPEND_PATH_TO_ADDRESS_VALUE = 2;

    public final int getNumber() {
      if (this == UNRECOGNIZED) {
        throw new java.lang.IllegalArgumentException(
            "Can't get the number of an unknown enum value.");
      }
      return value;
    }

    /**
     * @param value The numeric wire value of the corresponding enum entry.
     * @return The enum associated with the given numeric wire value.
     * @deprecated Use {@link #forNumber(int)} instead.
     */
    @java.lang.Deprecated
    public static PathTranslation valueOf(int value) {
      return forNumber(value);
    }

    /**
     * @param value The numeric wire value of the corresponding enum entry.
     * @return The enum associated with the given numeric wire value.
     */
    public static PathTranslation forNumber(int value) {
      switch (value) {
        case 0:
          return PATH_TRANSLATION_UNSPECIFIED;
        case 1:
          return CONSTANT_ADDRESS;
        case 2:
          return APPEND_PATH_TO_ADDRESS;
        default:
          return null;
      }
    }

    public static com.google.protobuf.Internal.EnumLiteMap<PathTranslation> internalGetValueMap() {
      return internalValueMap;
    }

    private static final com.google.protobuf.Internal.EnumLiteMap<PathTranslation>
        internalValueMap =
            new com.google.protobuf.Internal.EnumLiteMap<PathTranslation>() {
              public PathTranslation findValueByNumber(int number) {
                return PathTranslation.forNumber(number);
              }
            };

    public final com.google.protobuf.Descriptors.EnumValueDescriptor getValueDescriptor() {
      if (this == UNRECOGNIZED) {
        throw new java.lang.IllegalStateException(
            "Can't get the descriptor of an unrecognized enum value.");
      }
      return getDescriptor().getValues().get(ordinal());
    }

    public final com.google.protobuf.Descriptors.EnumDescriptor getDescriptorForType() {
      return getDescriptor();
    }

    public static final com.google.protobuf.Descriptors.EnumDescriptor getDescriptor() {
      return com.google.api.BackendRule.getDescriptor().getEnumTypes().get(0);
    }

    private static final PathTranslation[] VALUES = values();

    public static PathTranslation valueOf(
        com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
      if (desc.getType() != getDescriptor()) {
        throw new java.lang.IllegalArgumentException("EnumValueDescriptor is not for this type.");
      }
      if (desc.getIndex() == -1) {
        return UNRECOGNIZED;
      }
      return VALUES[desc.getIndex()];
    }

    private final int value;

    private PathTranslation(int value) {
      this.value = value;
    }

    // @@protoc_insertion_point(enum_scope:google.api.BackendRule.PathTranslation)
  }

  private int authenticationCase_ = 0;

  @SuppressWarnings("serial")
  private java.lang.Object authentication_;

  public enum AuthenticationCase
      implements
          com.google.protobuf.Internal.EnumLite,
          com.google.protobuf.AbstractMessage.InternalOneOfEnum {
    JWT_AUDIENCE(7),
    DISABLE_AUTH(8),
    AUTHENTICATION_NOT_SET(0);
    private final int value;

    private AuthenticationCase(int value) {
      this.value = value;
    }

    /**
     * @param value The number of the enum to look for.
     * @return The enum associated with the given number.
     * @deprecated Use {@link #forNumber(int)} instead.
     */
    @java.lang.Deprecated
    public static AuthenticationCase valueOf(int value) {
      return forNumber(value);
    }

    public static AuthenticationCase forNumber(int value) {
      switch (value) {
        case 7:
          return JWT_AUDIENCE;
        case 8:
          return DISABLE_AUTH;
        case 0:
          return AUTHENTICATION_NOT_SET;
        default:
          return null;
      }
    }

    public int getNumber() {
      return this.value;
    }
  };

  public AuthenticationCase getAuthenticationCase() {
    return AuthenticationCase.forNumber(authenticationCase_);
  }

  public static final int SELECTOR_FIELD_NUMBER = 1;

  @SuppressWarnings("serial")
  private volatile java.lang.Object selector_ = "";

  /**
   *
   *
   * <pre>
   * Selects the methods to which this rule applies.
   *
   * Refer to [selector][google.api.DocumentationRule.selector] for syntax
   * details.
   * </pre>
   *
   * <code>string selector = 1;</code>
   *
   * @return The selector.
   */
  @java.lang.Override
  public java.lang.String getSelector() {
    java.lang.Object ref = selector_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      selector_ = s;
      return s;
    }
  }

  /**
   *
   *
   * <pre>
   * Selects the methods to which this rule applies.
   *
   * Refer to [selector][google.api.DocumentationRule.selector] for syntax
   * details.
   * </pre>
   *
   * <code>string selector = 1;</code>
   *
   * @return The bytes for selector.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getSelectorBytes() {
    java.lang.Object ref = selector_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      selector_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int ADDRESS_FIELD_NUMBER = 2;

  @SuppressWarnings("serial")
  private volatile java.lang.Object address_ = "";

  /**
   *
   *
   * <pre>
   * The address of the API backend.
   *
   * The scheme is used to determine the backend protocol and security.
   * The following schemes are accepted:
   *
   *    SCHEME        PROTOCOL    SECURITY
   *    http://       HTTP        None
   *    https://      HTTP        TLS
   *    grpc://       gRPC        None
   *    grpcs://      gRPC        TLS
   *
   * It is recommended to explicitly include a scheme. Leaving out the scheme
   * may cause constrasting behaviors across platforms.
   *
   * If the port is unspecified, the default is:
   * - 80 for schemes without TLS
   * - 443 for schemes with TLS
   *
   * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
   * to specify the protocol version.
   * </pre>
   *
   * <code>string address = 2;</code>
   *
   * @return The address.
   */
  @java.lang.Override
  public java.lang.String getAddress() {
    java.lang.Object ref = address_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      address_ = s;
      return s;
    }
  }

  /**
   *
   *
   * <pre>
   * The address of the API backend.
   *
   * The scheme is used to determine the backend protocol and security.
   * The following schemes are accepted:
   *
   *    SCHEME        PROTOCOL    SECURITY
   *    http://       HTTP        None
   *    https://      HTTP        TLS
   *    grpc://       gRPC        None
   *    grpcs://      gRPC        TLS
   *
   * It is recommended to explicitly include a scheme. Leaving out the scheme
   * may cause constrasting behaviors across platforms.
   *
   * If the port is unspecified, the default is:
   * - 80 for schemes without TLS
   * - 443 for schemes with TLS
   *
   * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
   * to specify the protocol version.
   * </pre>
   *
   * <code>string address = 2;</code>
   *
   * @return The bytes for address.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getAddressBytes() {
    java.lang.Object ref = address_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      address_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int DEADLINE_FIELD_NUMBER = 3;
  private double deadline_ = 0D;

  /**
   *
   *
   * <pre>
   * The number of seconds to wait for a response from a request. The default
   * varies based on the request protocol and deployment environment.
   * </pre>
   *
   * <code>double deadline = 3;</code>
   *
   * @return The deadline.
   */
  @java.lang.Override
  public double getDeadline() {
    return deadline_;
  }

  public static final int MIN_DEADLINE_FIELD_NUMBER = 4;
  private double minDeadline_ = 0D;

  /**
   *
   *
   * <pre>
   * Deprecated, do not use.
   * </pre>
   *
   * <code>double min_deadline = 4 [deprecated = true];</code>
   *
   * @deprecated google.api.BackendRule.min_deadline is deprecated. See
   *     google/api/backend.proto;l=124
   * @return The minDeadline.
   */
  @java.lang.Override
  @java.lang.Deprecated
  public double getMinDeadline() {
    return minDeadline_;
  }

  public static final int OPERATION_DEADLINE_FIELD_NUMBER = 5;
  private double operationDeadline_ = 0D;

  /**
   *
   *
   * <pre>
   * The number of seconds to wait for the completion of a long running
   * operation. The default is no deadline.
   * </pre>
   *
   * <code>double operation_deadline = 5;</code>
   *
   * @return The operationDeadline.
   */
  @java.lang.Override
  public double getOperationDeadline() {
    return operationDeadline_;
  }

  public static final int PATH_TRANSLATION_FIELD_NUMBER = 6;
  private int pathTranslation_ = 0;

  /**
   * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
   *
   * @return The enum numeric value on the wire for pathTranslation.
   */
  @java.lang.Override
  public int getPathTranslationValue() {
    return pathTranslation_;
  }

  /**
   * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
   *
   * @return The pathTranslation.
   */
  @java.lang.Override
  public com.google.api.BackendRule.PathTranslation getPathTranslation() {
    com.google.api.BackendRule.PathTranslation result =
        com.google.api.BackendRule.PathTranslation.forNumber(pathTranslation_);
    return result == null ? com.google.api.BackendRule.PathTranslation.UNRECOGNIZED : result;
  }

  public static final int JWT_AUDIENCE_FIELD_NUMBER = 7;

  /**
   *
   *
   * <pre>
   * The JWT audience is used when generating a JWT ID token for the backend.
   * This ID token will be added in the HTTP "authorization" header, and sent
   * to the backend.
   * </pre>
   *
   * <code>string jwt_audience = 7;</code>
   *
   * @return Whether the jwtAudience field is set.
   */
  public boolean hasJwtAudience() {
    return authenticationCase_ == 7;
  }

  /**
   *
   *
   * <pre>
   * The JWT audience is used when generating a JWT ID token for the backend.
   * This ID token will be added in the HTTP "authorization" header, and sent
   * to the backend.
   * </pre>
   *
   * <code>string jwt_audience = 7;</code>
   *
   * @return The jwtAudience.
   */
  public java.lang.String getJwtAudience() {
    java.lang.Object ref = "";
    if (authenticationCase_ == 7) {
      ref = authentication_;
    }
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      if (authenticationCase_ == 7) {
        authentication_ = s;
      }
      return s;
    }
  }

  /**
   *
   *
   * <pre>
   * The JWT audience is used when generating a JWT ID token for the backend.
   * This ID token will be added in the HTTP "authorization" header, and sent
   * to the backend.
   * </pre>
   *
   * <code>string jwt_audience = 7;</code>
   *
   * @return The bytes for jwtAudience.
   */
  public com.google.protobuf.ByteString getJwtAudienceBytes() {
    java.lang.Object ref = "";
    if (authenticationCase_ == 7) {
      ref = authentication_;
    }
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      if (authenticationCase_ == 7) {
        authentication_ = b;
      }
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int DISABLE_AUTH_FIELD_NUMBER = 8;

  /**
   *
   *
   * <pre>
   * When disable_auth is true, a JWT ID token won't be generated and the
   * original "Authorization" HTTP header will be preserved. If the header is
   * used to carry the original token and is expected by the backend, this
   * field must be set to true to preserve the header.
   * </pre>
   *
   * <code>bool disable_auth = 8;</code>
   *
   * @return Whether the disableAuth field is set.
   */
  @java.lang.Override
  public boolean hasDisableAuth() {
    return authenticationCase_ == 8;
  }

  /**
   *
   *
   * <pre>
   * When disable_auth is true, a JWT ID token won't be generated and the
   * original "Authorization" HTTP header will be preserved. If the header is
   * used to carry the original token and is expected by the backend, this
   * field must be set to true to preserve the header.
   * </pre>
   *
   * <code>bool disable_auth = 8;</code>
   *
   * @return The disableAuth.
   */
  @java.lang.Override
  public boolean getDisableAuth() {
    if (authenticationCase_ == 8) {
      return (java.lang.Boolean) authentication_;
    }
    return false;
  }

  public static final int PROTOCOL_FIELD_NUMBER = 9;

  @SuppressWarnings("serial")
  private volatile java.lang.Object protocol_ = "";

  /**
   *
   *
   * <pre>
   * The protocol used for sending a request to the backend.
   * The supported values are "http/1.1" and "h2".
   *
   * The default value is inferred from the scheme in the
   * [address][google.api.BackendRule.address] field:
   *
   *    SCHEME        PROTOCOL
   *    http://       http/1.1
   *    https://      http/1.1
   *    grpc://       h2
   *    grpcs://      h2
   *
   * For secure HTTP backends (https://) that support HTTP/2, set this field
   * to "h2" for improved performance.
   *
   * Configuring this field to non-default values is only supported for secure
   * HTTP backends. This field will be ignored for all other backends.
   *
   * See
   * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
   * for more details on the supported values.
   * </pre>
   *
   * <code>string protocol = 9;</code>
   *
   * @return The protocol.
   */
  @java.lang.Override
  public java.lang.String getProtocol() {
    java.lang.Object ref = protocol_;
    if (ref instanceof java.lang.String) {
      return (java.lang.String) ref;
    } else {
      com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
      java.lang.String s = bs.toStringUtf8();
      protocol_ = s;
      return s;
    }
  }

  /**
   *
   *
   * <pre>
   * The protocol used for sending a request to the backend.
   * The supported values are "http/1.1" and "h2".
   *
   * The default value is inferred from the scheme in the
   * [address][google.api.BackendRule.address] field:
   *
   *    SCHEME        PROTOCOL
   *    http://       http/1.1
   *    https://      http/1.1
   *    grpc://       h2
   *    grpcs://      h2
   *
   * For secure HTTP backends (https://) that support HTTP/2, set this field
   * to "h2" for improved performance.
   *
   * Configuring this field to non-default values is only supported for secure
   * HTTP backends. This field will be ignored for all other backends.
   *
   * See
   * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
   * for more details on the supported values.
   * </pre>
   *
   * <code>string protocol = 9;</code>
   *
   * @return The bytes for protocol.
   */
  @java.lang.Override
  public com.google.protobuf.ByteString getProtocolBytes() {
    java.lang.Object ref = protocol_;
    if (ref instanceof java.lang.String) {
      com.google.protobuf.ByteString b =
          com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
      protocol_ = b;
      return b;
    } else {
      return (com.google.protobuf.ByteString) ref;
    }
  }

  public static final int OVERRIDES_BY_REQUEST_PROTOCOL_FIELD_NUMBER = 10;

  private static final class OverridesByRequestProtocolDefaultEntryHolder {
    static final com.google.protobuf.MapEntry<java.lang.String, com.google.api.BackendRule>
        defaultEntry =
            com.google.protobuf.MapEntry
                .<java.lang.String, com.google.api.BackendRule>newDefaultInstance(
                    com.google.api.BackendProto
                        .internal_static_google_api_BackendRule_OverridesByRequestProtocolEntry_descriptor,
                    com.google.protobuf.WireFormat.FieldType.STRING,
                    "",
                    com.google.protobuf.WireFormat.FieldType.MESSAGE,
                    com.google.api.BackendRule.getDefaultInstance());
  }

  @SuppressWarnings("serial")
  private com.google.protobuf.MapField<java.lang.String, com.google.api.BackendRule>
      overridesByRequestProtocol_;

  private com.google.protobuf.MapField<java.lang.String, com.google.api.BackendRule>
      internalGetOverridesByRequestProtocol() {
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  @java.lang.Override
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  public /* nullable */ com.google.api.BackendRule getOverridesByRequestProtocolOrDefault(
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  public com.google.api.BackendRule getOverridesByRequestProtocolOrThrow(java.lang.String key) {
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    if (!(obj instanceof com.google.api.BackendRule)) {
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    switch (authenticationCase_) {
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    int hash = 41;
    hash = (19 * hash) + getDescriptor().hashCode();
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    hash = (53 * hash) + getSelector().hashCode();
    hash = (37 * hash) + ADDRESS_FIELD_NUMBER;
    hash = (53 * hash) + getAddress().hashCode();
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    hash =
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      case 0:
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    hash = (29 * hash) + getUnknownFields().hashCode();
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  public static com.google.api.BackendRule parseFrom(java.nio.ByteBuffer data)
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  public static com.google.api.BackendRule parseFrom(
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  public static com.google.api.BackendRule parseFrom(
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  public static com.google.api.BackendRule parseDelimitedFrom(java.io.InputStream input)
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  public static com.google.api.BackendRule parseFrom(com.google.protobuf.CodedInputStream input)
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  public static com.google.api.BackendRule parseFrom(
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  protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.BuilderParent parent) {
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  /**
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    protected com.google.protobuf.MapFieldReflectionAccessor internalGetMapFieldReflection(
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      operationDeadline_ = 0D;
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      protocol_ = "";
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      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        selector_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * Selects the methods to which this rule applies.
     *
     * Refer to [selector][google.api.DocumentationRule.selector] for syntax
     * details.
     * </pre>
     *
     * <code>string selector = 1;</code>
     *
     * @return The bytes for selector.
     */
    public com.google.protobuf.ByteString getSelectorBytes() {
      java.lang.Object ref = selector_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        selector_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * Selects the methods to which this rule applies.
     *
     * Refer to [selector][google.api.DocumentationRule.selector] for syntax
     * details.
     * </pre>
     *
     * <code>string selector = 1;</code>
     *
     * @param value The selector to set.
     * @return This builder for chaining.
     */
    public Builder setSelector(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      selector_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * Selects the methods to which this rule applies.
     *
     * Refer to [selector][google.api.DocumentationRule.selector] for syntax
     * details.
     * </pre>
     *
     * <code>string selector = 1;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearSelector() {
      selector_ = getDefaultInstance().getSelector();
      bitField0_ = (bitField0_ & ~0x00000001);
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * Selects the methods to which this rule applies.
     *
     * Refer to [selector][google.api.DocumentationRule.selector] for syntax
     * details.
     * </pre>
     *
     * <code>string selector = 1;</code>
     *
     * @param value The bytes for selector to set.
     * @return This builder for chaining.
     */
    public Builder setSelectorBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      selector_ = value;
      bitField0_ |= 0x00000001;
      onChanged();
      return this;
    }

    private java.lang.Object address_ = "";

    /**
     *
     *
     * <pre>
     * The address of the API backend.
     *
     * The scheme is used to determine the backend protocol and security.
     * The following schemes are accepted:
     *
     *    SCHEME        PROTOCOL    SECURITY
     *    http://       HTTP        None
     *    https://      HTTP        TLS
     *    grpc://       gRPC        None
     *    grpcs://      gRPC        TLS
     *
     * It is recommended to explicitly include a scheme. Leaving out the scheme
     * may cause constrasting behaviors across platforms.
     *
     * If the port is unspecified, the default is:
     * - 80 for schemes without TLS
     * - 443 for schemes with TLS
     *
     * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
     * to specify the protocol version.
     * </pre>
     *
     * <code>string address = 2;</code>
     *
     * @return The address.
     */
    public java.lang.String getAddress() {
      java.lang.Object ref = address_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        address_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The address of the API backend.
     *
     * The scheme is used to determine the backend protocol and security.
     * The following schemes are accepted:
     *
     *    SCHEME        PROTOCOL    SECURITY
     *    http://       HTTP        None
     *    https://      HTTP        TLS
     *    grpc://       gRPC        None
     *    grpcs://      gRPC        TLS
     *
     * It is recommended to explicitly include a scheme. Leaving out the scheme
     * may cause constrasting behaviors across platforms.
     *
     * If the port is unspecified, the default is:
     * - 80 for schemes without TLS
     * - 443 for schemes with TLS
     *
     * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
     * to specify the protocol version.
     * </pre>
     *
     * <code>string address = 2;</code>
     *
     * @return The bytes for address.
     */
    public com.google.protobuf.ByteString getAddressBytes() {
      java.lang.Object ref = address_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        address_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The address of the API backend.
     *
     * The scheme is used to determine the backend protocol and security.
     * The following schemes are accepted:
     *
     *    SCHEME        PROTOCOL    SECURITY
     *    http://       HTTP        None
     *    https://      HTTP        TLS
     *    grpc://       gRPC        None
     *    grpcs://      gRPC        TLS
     *
     * It is recommended to explicitly include a scheme. Leaving out the scheme
     * may cause constrasting behaviors across platforms.
     *
     * If the port is unspecified, the default is:
     * - 80 for schemes without TLS
     * - 443 for schemes with TLS
     *
     * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
     * to specify the protocol version.
     * </pre>
     *
     * <code>string address = 2;</code>
     *
     * @param value The address to set.
     * @return This builder for chaining.
     */
    public Builder setAddress(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      address_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The address of the API backend.
     *
     * The scheme is used to determine the backend protocol and security.
     * The following schemes are accepted:
     *
     *    SCHEME        PROTOCOL    SECURITY
     *    http://       HTTP        None
     *    https://      HTTP        TLS
     *    grpc://       gRPC        None
     *    grpcs://      gRPC        TLS
     *
     * It is recommended to explicitly include a scheme. Leaving out the scheme
     * may cause constrasting behaviors across platforms.
     *
     * If the port is unspecified, the default is:
     * - 80 for schemes without TLS
     * - 443 for schemes with TLS
     *
     * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
     * to specify the protocol version.
     * </pre>
     *
     * <code>string address = 2;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearAddress() {
      address_ = getDefaultInstance().getAddress();
      bitField0_ = (bitField0_ & ~0x00000002);
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The address of the API backend.
     *
     * The scheme is used to determine the backend protocol and security.
     * The following schemes are accepted:
     *
     *    SCHEME        PROTOCOL    SECURITY
     *    http://       HTTP        None
     *    https://      HTTP        TLS
     *    grpc://       gRPC        None
     *    grpcs://      gRPC        TLS
     *
     * It is recommended to explicitly include a scheme. Leaving out the scheme
     * may cause constrasting behaviors across platforms.
     *
     * If the port is unspecified, the default is:
     * - 80 for schemes without TLS
     * - 443 for schemes with TLS
     *
     * For HTTP backends, use [protocol][google.api.BackendRule.protocol]
     * to specify the protocol version.
     * </pre>
     *
     * <code>string address = 2;</code>
     *
     * @param value The bytes for address to set.
     * @return This builder for chaining.
     */
    public Builder setAddressBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      address_ = value;
      bitField0_ |= 0x00000002;
      onChanged();
      return this;
    }

    private double deadline_;

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for a response from a request. The default
     * varies based on the request protocol and deployment environment.
     * </pre>
     *
     * <code>double deadline = 3;</code>
     *
     * @return The deadline.
     */
    @java.lang.Override
    public double getDeadline() {
      return deadline_;
    }

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for a response from a request. The default
     * varies based on the request protocol and deployment environment.
     * </pre>
     *
     * <code>double deadline = 3;</code>
     *
     * @param value The deadline to set.
     * @return This builder for chaining.
     */
    public Builder setDeadline(double value) {

      deadline_ = value;
      bitField0_ |= 0x00000004;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for a response from a request. The default
     * varies based on the request protocol and deployment environment.
     * </pre>
     *
     * <code>double deadline = 3;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearDeadline() {
      bitField0_ = (bitField0_ & ~0x00000004);
      deadline_ = 0D;
      onChanged();
      return this;
    }

    private double minDeadline_;

    /**
     *
     *
     * <pre>
     * Deprecated, do not use.
     * </pre>
     *
     * <code>double min_deadline = 4 [deprecated = true];</code>
     *
     * @deprecated google.api.BackendRule.min_deadline is deprecated. See
     *     google/api/backend.proto;l=124
     * @return The minDeadline.
     */
    @java.lang.Override
    @java.lang.Deprecated
    public double getMinDeadline() {
      return minDeadline_;
    }

    /**
     *
     *
     * <pre>
     * Deprecated, do not use.
     * </pre>
     *
     * <code>double min_deadline = 4 [deprecated = true];</code>
     *
     * @deprecated google.api.BackendRule.min_deadline is deprecated. See
     *     google/api/backend.proto;l=124
     * @param value The minDeadline to set.
     * @return This builder for chaining.
     */
    @java.lang.Deprecated
    public Builder setMinDeadline(double value) {

      minDeadline_ = value;
      bitField0_ |= 0x00000008;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * Deprecated, do not use.
     * </pre>
     *
     * <code>double min_deadline = 4 [deprecated = true];</code>
     *
     * @deprecated google.api.BackendRule.min_deadline is deprecated. See
     *     google/api/backend.proto;l=124
     * @return This builder for chaining.
     */
    @java.lang.Deprecated
    public Builder clearMinDeadline() {
      bitField0_ = (bitField0_ & ~0x00000008);
      minDeadline_ = 0D;
      onChanged();
      return this;
    }

    private double operationDeadline_;

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for the completion of a long running
     * operation. The default is no deadline.
     * </pre>
     *
     * <code>double operation_deadline = 5;</code>
     *
     * @return The operationDeadline.
     */
    @java.lang.Override
    public double getOperationDeadline() {
      return operationDeadline_;
    }

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for the completion of a long running
     * operation. The default is no deadline.
     * </pre>
     *
     * <code>double operation_deadline = 5;</code>
     *
     * @param value The operationDeadline to set.
     * @return This builder for chaining.
     */
    public Builder setOperationDeadline(double value) {

      operationDeadline_ = value;
      bitField0_ |= 0x00000010;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The number of seconds to wait for the completion of a long running
     * operation. The default is no deadline.
     * </pre>
     *
     * <code>double operation_deadline = 5;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearOperationDeadline() {
      bitField0_ = (bitField0_ & ~0x00000010);
      operationDeadline_ = 0D;
      onChanged();
      return this;
    }

    private int pathTranslation_ = 0;

    /**
     * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
     *
     * @return The enum numeric value on the wire for pathTranslation.
     */
    @java.lang.Override
    public int getPathTranslationValue() {
      return pathTranslation_;
    }

    /**
     * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
     *
     * @param value The enum numeric value on the wire for pathTranslation to set.
     * @return This builder for chaining.
     */
    public Builder setPathTranslationValue(int value) {
      pathTranslation_ = value;
      bitField0_ |= 0x00000020;
      onChanged();
      return this;
    }

    /**
     * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
     *
     * @return The pathTranslation.
     */
    @java.lang.Override
    public com.google.api.BackendRule.PathTranslation getPathTranslation() {
      com.google.api.BackendRule.PathTranslation result =
          com.google.api.BackendRule.PathTranslation.forNumber(pathTranslation_);
      return result == null ? com.google.api.BackendRule.PathTranslation.UNRECOGNIZED : result;
    }

    /**
     * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
     *
     * @param value The pathTranslation to set.
     * @return This builder for chaining.
     */
    public Builder setPathTranslation(com.google.api.BackendRule.PathTranslation value) {
      if (value == null) {
        throw new NullPointerException();
      }
      bitField0_ |= 0x00000020;
      pathTranslation_ = value.getNumber();
      onChanged();
      return this;
    }

    /**
     * <code>.google.api.BackendRule.PathTranslation path_translation = 6;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearPathTranslation() {
      bitField0_ = (bitField0_ & ~0x00000020);
      pathTranslation_ = 0;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @return Whether the jwtAudience field is set.
     */
    @java.lang.Override
    public boolean hasJwtAudience() {
      return authenticationCase_ == 7;
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @return The jwtAudience.
     */
    @java.lang.Override
    public java.lang.String getJwtAudience() {
      java.lang.Object ref = "";
      if (authenticationCase_ == 7) {
        ref = authentication_;
      }
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        if (authenticationCase_ == 7) {
          authentication_ = s;
        }
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @return The bytes for jwtAudience.
     */
    @java.lang.Override
    public com.google.protobuf.ByteString getJwtAudienceBytes() {
      java.lang.Object ref = "";
      if (authenticationCase_ == 7) {
        ref = authentication_;
      }
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        if (authenticationCase_ == 7) {
          authentication_ = b;
        }
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @param value The jwtAudience to set.
     * @return This builder for chaining.
     */
    public Builder setJwtAudience(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      authenticationCase_ = 7;
      authentication_ = value;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearJwtAudience() {
      if (authenticationCase_ == 7) {
        authenticationCase_ = 0;
        authentication_ = null;
        onChanged();
      }
      return this;
    }

    /**
     *
     *
     * <pre>
     * The JWT audience is used when generating a JWT ID token for the backend.
     * This ID token will be added in the HTTP "authorization" header, and sent
     * to the backend.
     * </pre>
     *
     * <code>string jwt_audience = 7;</code>
     *
     * @param value The bytes for jwtAudience to set.
     * @return This builder for chaining.
     */
    public Builder setJwtAudienceBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      authenticationCase_ = 7;
      authentication_ = value;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * When disable_auth is true, a JWT ID token won't be generated and the
     * original "Authorization" HTTP header will be preserved. If the header is
     * used to carry the original token and is expected by the backend, this
     * field must be set to true to preserve the header.
     * </pre>
     *
     * <code>bool disable_auth = 8;</code>
     *
     * @return Whether the disableAuth field is set.
     */
    public boolean hasDisableAuth() {
      return authenticationCase_ == 8;
    }

    /**
     *
     *
     * <pre>
     * When disable_auth is true, a JWT ID token won't be generated and the
     * original "Authorization" HTTP header will be preserved. If the header is
     * used to carry the original token and is expected by the backend, this
     * field must be set to true to preserve the header.
     * </pre>
     *
     * <code>bool disable_auth = 8;</code>
     *
     * @return The disableAuth.
     */
    public boolean getDisableAuth() {
      if (authenticationCase_ == 8) {
        return (java.lang.Boolean) authentication_;
      }
      return false;
    }

    /**
     *
     *
     * <pre>
     * When disable_auth is true, a JWT ID token won't be generated and the
     * original "Authorization" HTTP header will be preserved. If the header is
     * used to carry the original token and is expected by the backend, this
     * field must be set to true to preserve the header.
     * </pre>
     *
     * <code>bool disable_auth = 8;</code>
     *
     * @param value The disableAuth to set.
     * @return This builder for chaining.
     */
    public Builder setDisableAuth(boolean value) {

      authenticationCase_ = 8;
      authentication_ = value;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * When disable_auth is true, a JWT ID token won't be generated and the
     * original "Authorization" HTTP header will be preserved. If the header is
     * used to carry the original token and is expected by the backend, this
     * field must be set to true to preserve the header.
     * </pre>
     *
     * <code>bool disable_auth = 8;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearDisableAuth() {
      if (authenticationCase_ == 8) {
        authenticationCase_ = 0;
        authentication_ = null;
        onChanged();
      }
      return this;
    }

    private java.lang.Object protocol_ = "";

    /**
     *
     *
     * <pre>
     * The protocol used for sending a request to the backend.
     * The supported values are "http/1.1" and "h2".
     *
     * The default value is inferred from the scheme in the
     * [address][google.api.BackendRule.address] field:
     *
     *    SCHEME        PROTOCOL
     *    http://       http/1.1
     *    https://      http/1.1
     *    grpc://       h2
     *    grpcs://      h2
     *
     * For secure HTTP backends (https://) that support HTTP/2, set this field
     * to "h2" for improved performance.
     *
     * Configuring this field to non-default values is only supported for secure
     * HTTP backends. This field will be ignored for all other backends.
     *
     * See
     * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
     * for more details on the supported values.
     * </pre>
     *
     * <code>string protocol = 9;</code>
     *
     * @return The protocol.
     */
    public java.lang.String getProtocol() {
      java.lang.Object ref = protocol_;
      if (!(ref instanceof java.lang.String)) {
        com.google.protobuf.ByteString bs = (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
        protocol_ = s;
        return s;
      } else {
        return (java.lang.String) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The protocol used for sending a request to the backend.
     * The supported values are "http/1.1" and "h2".
     *
     * The default value is inferred from the scheme in the
     * [address][google.api.BackendRule.address] field:
     *
     *    SCHEME        PROTOCOL
     *    http://       http/1.1
     *    https://      http/1.1
     *    grpc://       h2
     *    grpcs://      h2
     *
     * For secure HTTP backends (https://) that support HTTP/2, set this field
     * to "h2" for improved performance.
     *
     * Configuring this field to non-default values is only supported for secure
     * HTTP backends. This field will be ignored for all other backends.
     *
     * See
     * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
     * for more details on the supported values.
     * </pre>
     *
     * <code>string protocol = 9;</code>
     *
     * @return The bytes for protocol.
     */
    public com.google.protobuf.ByteString getProtocolBytes() {
      java.lang.Object ref = protocol_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        protocol_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    /**
     *
     *
     * <pre>
     * The protocol used for sending a request to the backend.
     * The supported values are "http/1.1" and "h2".
     *
     * The default value is inferred from the scheme in the
     * [address][google.api.BackendRule.address] field:
     *
     *    SCHEME        PROTOCOL
     *    http://       http/1.1
     *    https://      http/1.1
     *    grpc://       h2
     *    grpcs://      h2
     *
     * For secure HTTP backends (https://) that support HTTP/2, set this field
     * to "h2" for improved performance.
     *
     * Configuring this field to non-default values is only supported for secure
     * HTTP backends. This field will be ignored for all other backends.
     *
     * See
     * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
     * for more details on the supported values.
     * </pre>
     *
     * <code>string protocol = 9;</code>
     *
     * @param value The protocol to set.
     * @return This builder for chaining.
     */
    public Builder setProtocol(java.lang.String value) {
      if (value == null) {
        throw new NullPointerException();
      }
      protocol_ = value;
      bitField0_ |= 0x00000100;
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The protocol used for sending a request to the backend.
     * The supported values are "http/1.1" and "h2".
     *
     * The default value is inferred from the scheme in the
     * [address][google.api.BackendRule.address] field:
     *
     *    SCHEME        PROTOCOL
     *    http://       http/1.1
     *    https://      http/1.1
     *    grpc://       h2
     *    grpcs://      h2
     *
     * For secure HTTP backends (https://) that support HTTP/2, set this field
     * to "h2" for improved performance.
     *
     * Configuring this field to non-default values is only supported for secure
     * HTTP backends. This field will be ignored for all other backends.
     *
     * See
     * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
     * for more details on the supported values.
     * </pre>
     *
     * <code>string protocol = 9;</code>
     *
     * @return This builder for chaining.
     */
    public Builder clearProtocol() {
      protocol_ = getDefaultInstance().getProtocol();
      bitField0_ = (bitField0_ & ~0x00000100);
      onChanged();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The protocol used for sending a request to the backend.
     * The supported values are "http/1.1" and "h2".
     *
     * The default value is inferred from the scheme in the
     * [address][google.api.BackendRule.address] field:
     *
     *    SCHEME        PROTOCOL
     *    http://       http/1.1
     *    https://      http/1.1
     *    grpc://       h2
     *    grpcs://      h2
     *
     * For secure HTTP backends (https://) that support HTTP/2, set this field
     * to "h2" for improved performance.
     *
     * Configuring this field to non-default values is only supported for secure
     * HTTP backends. This field will be ignored for all other backends.
     *
     * See
     * https://www.iana.org/assignments/tls-extensiontype-values/tls-extensiontype-values.xhtml#alpn-protocol-ids
     * for more details on the supported values.
     * </pre>
     *
     * <code>string protocol = 9;</code>
     *
     * @param value The bytes for protocol to set.
     * @return This builder for chaining.
     */
    public Builder setProtocolBytes(com.google.protobuf.ByteString value) {
      if (value == null) {
        throw new NullPointerException();
      }
      checkByteStringIsUtf8(value);
      protocol_ = value;
      bitField0_ |= 0x00000100;
      onChanged();
      return this;
    }

    private static final class OverridesByRequestProtocolConverter
        implements com.google.protobuf.MapFieldBuilder.Converter<
            java.lang.String, com.google.api.BackendRuleOrBuilder, com.google.api.BackendRule> {
      @java.lang.Override
      public com.google.api.BackendRule build(com.google.api.BackendRuleOrBuilder val) {
        if (val instanceof com.google.api.BackendRule) {
          return (com.google.api.BackendRule) val;
        }
        return ((com.google.api.BackendRule.Builder) val).build();
      }

      @java.lang.Override
      public com.google.protobuf.MapEntry<java.lang.String, com.google.api.BackendRule>
          defaultEntry() {
        return OverridesByRequestProtocolDefaultEntryHolder.defaultEntry;
      }
    }
    ;

    private static final OverridesByRequestProtocolConverter overridesByRequestProtocolConverter =
        new OverridesByRequestProtocolConverter();

    private com.google.protobuf.MapFieldBuilder<
            java.lang.String,
            com.google.api.BackendRuleOrBuilder,
            com.google.api.BackendRule,
            com.google.api.BackendRule.Builder>
        overridesByRequestProtocol_;

    private com.google.protobuf.MapFieldBuilder<
            java.lang.String,
            com.google.api.BackendRuleOrBuilder,
            com.google.api.BackendRule,
            com.google.api.BackendRule.Builder>
        internalGetOverridesByRequestProtocol() {
      if (overridesByRequestProtocol_ == null) {
        return new com.google.protobuf.MapFieldBuilder<>(overridesByRequestProtocolConverter);
      }
      return overridesByRequestProtocol_;
    }

    private com.google.protobuf.MapFieldBuilder<
            java.lang.String,
            com.google.api.BackendRuleOrBuilder,
            com.google.api.BackendRule,
            com.google.api.BackendRule.Builder>
        internalGetMutableOverridesByRequestProtocol() {
      if (overridesByRequestProtocol_ == null) {
        overridesByRequestProtocol_ =
            new com.google.protobuf.MapFieldBuilder<>(overridesByRequestProtocolConverter);
      }
      bitField0_ |= 0x00000200;
      onChanged();
      return overridesByRequestProtocol_;
    }

    public int getOverridesByRequestProtocolCount() {
      return internalGetOverridesByRequestProtocol().ensureBuilderMap().size();
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    @java.lang.Override
    public boolean containsOverridesByRequestProtocol(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      return internalGetOverridesByRequestProtocol().ensureBuilderMap().containsKey(key);
    }

    /** Use {@link #getOverridesByRequestProtocolMap()} instead. */
    @java.lang.Override
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, com.google.api.BackendRule>
        getOverridesByRequestProtocol() {
      return getOverridesByRequestProtocolMap();
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    @java.lang.Override
    public java.util.Map<java.lang.String, com.google.api.BackendRule>
        getOverridesByRequestProtocolMap() {
      return internalGetOverridesByRequestProtocol().getImmutableMap();
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    @java.lang.Override
    public /* nullable */ com.google.api.BackendRule getOverridesByRequestProtocolOrDefault(
        java.lang.String key,
        /* nullable */
        com.google.api.BackendRule defaultValue) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      java.util.Map<java.lang.String, com.google.api.BackendRuleOrBuilder> map =
          internalGetMutableOverridesByRequestProtocol().ensureBuilderMap();
      return map.containsKey(key)
          ? overridesByRequestProtocolConverter.build(map.get(key))
          : defaultValue;
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    @java.lang.Override
    public com.google.api.BackendRule getOverridesByRequestProtocolOrThrow(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      java.util.Map<java.lang.String, com.google.api.BackendRuleOrBuilder> map =
          internalGetMutableOverridesByRequestProtocol().ensureBuilderMap();
      if (!map.containsKey(key)) {
        throw new java.lang.IllegalArgumentException();
      }
      return overridesByRequestProtocolConverter.build(map.get(key));
    }

    public Builder clearOverridesByRequestProtocol() {
      bitField0_ = (bitField0_ & ~0x00000200);
      internalGetMutableOverridesByRequestProtocol().clear();
      return this;
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    public Builder removeOverridesByRequestProtocol(java.lang.String key) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      internalGetMutableOverridesByRequestProtocol().ensureBuilderMap().remove(key);
      return this;
    }

    /** Use alternate mutation accessors instead. */
    @java.lang.Deprecated
    public java.util.Map<java.lang.String, com.google.api.BackendRule>
        getMutableOverridesByRequestProtocol() {
      bitField0_ |= 0x00000200;
      return internalGetMutableOverridesByRequestProtocol().ensureMessageMap();
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    public Builder putOverridesByRequestProtocol(
        java.lang.String key, com.google.api.BackendRule value) {
      if (key == null) {
        throw new NullPointerException("map key");
      }
      if (value == null) {
        throw new NullPointerException("map value");
      }
      internalGetMutableOverridesByRequestProtocol().ensureBuilderMap().put(key, value);
      bitField0_ |= 0x00000200;
      return this;
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    public Builder putAllOverridesByRequestProtocol(
        java.util.Map<java.lang.String, com.google.api.BackendRule> values) {
      for (java.util.Map.Entry<java.lang.String, com.google.api.BackendRule> e :
          values.entrySet()) {
        if (e.getKey() == null || e.getValue() == null) {
          throw new NullPointerException();
        }
      }
      internalGetMutableOverridesByRequestProtocol().ensureBuilderMap().putAll(values);
      bitField0_ |= 0x00000200;
      return this;
    }

    /**
     *
     *
     * <pre>
     * The map between request protocol and the backend address.
     * </pre>
     *
     * <code>map&lt;string, .google.api.BackendRule&gt; overrides_by_request_protocol = 10;</code>
     */
    public com.google.api.BackendRule.Builder putOverridesByRequestProtocolBuilderIfAbsent(
        java.lang.String key) {
      java.util.Map<java.lang.String, com.google.api.BackendRuleOrBuilder> builderMap =
          internalGetMutableOverridesByRequestProtocol().ensureBuilderMap();
      com.google.api.BackendRuleOrBuilder entry = builderMap.get(key);
      if (entry == null) {
        entry = com.google.api.BackendRule.newBuilder();
        builderMap.put(key, entry);
      }
      if (entry instanceof com.google.api.BackendRule) {
        entry = ((com.google.api.BackendRule) entry).toBuilder();
        builderMap.put(key, entry);
      }
      return (com.google.api.BackendRule.Builder) entry;
    }

    @java.lang.Override
    public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.setUnknownFields(unknownFields);
    }

    @java.lang.Override
    public final Builder mergeUnknownFields(
        final com.google.protobuf.UnknownFieldSet unknownFields) {
      return super.mergeUnknownFields(unknownFields);
    }

    // @@protoc_insertion_point(builder_scope:google.api.BackendRule)
  }

  // @@protoc_insertion_point(class_scope:google.api.BackendRule)
  private static final com.google.api.BackendRule DEFAULT_INSTANCE;

  static {
    DEFAULT_INSTANCE = new com.google.api.BackendRule();
  }

  public static com.google.api.BackendRule getDefaultInstance() {
    return DEFAULT_INSTANCE;
  }

  private static final com.google.protobuf.Parser<BackendRule> PARSER =
      new com.google.protobuf.AbstractParser<BackendRule>() {
        @java.lang.Override
        public BackendRule parsePartialFrom(
            com.google.protobuf.CodedInputStream input,
            com.google.protobuf.ExtensionRegistryLite extensionRegistry)
            throws com.google.protobuf.InvalidProtocolBufferException {
          Builder builder = newBuilder();
          try {
            builder.mergeFrom(input, extensionRegistry);
          } catch (com.google.protobuf.InvalidProtocolBufferException e) {
            throw e.setUnfinishedMessage(builder.buildPartial());
          } catch (com.google.protobuf.UninitializedMessageException e) {
            throw e.asInvalidProtocolBufferException().setUnfinishedMessage(builder.buildPartial());
          } catch (java.io.IOException e) {
            throw new com.google.protobuf.InvalidProtocolBufferException(e)
                .setUnfinishedMessage(builder.buildPartial());
          }
          return builder.buildPartial();
        }
      };

  public static com.google.protobuf.Parser<BackendRule> parser() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.protobuf.Parser<BackendRule> getParserForType() {
    return PARSER;
  }

  @java.lang.Override
  public com.google.api.BackendRule getDefaultInstanceForType() {
    return DEFAULT_INSTANCE;
  }
}